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b305a080 WYG |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
fb4961db | 5 | * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved. |
b305a080 WYG |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of version 2 of the GNU General Public License as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
19 | * USA | |
20 | * | |
21 | * The full GNU General Public License is included in this distribution | |
22 | * in the file called LICENSE.GPL. | |
23 | * | |
24 | * Contact Information: | |
25 | * Intel Linux Wireless <ilw@linux.intel.com> | |
26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
27 | * | |
28 | *****************************************************************************/ | |
29 | ||
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/sched.h> | |
a0eaad71 | 34 | #include <linux/ieee80211.h> |
b305a080 WYG |
35 | |
36 | #include "iwl-dev.h" | |
b305a080 | 37 | #include "iwl-io.h" |
19e6cda0 | 38 | #include "iwl-agn-hw.h" |
8d801080 | 39 | #include "iwl-agn.h" |
47c1b496 | 40 | #include "iwl-trans.h" |
b305a080 | 41 | |
9eae88fa JB |
42 | static const u8 tid_to_ac[] = { |
43 | IEEE80211_AC_BE, | |
44 | IEEE80211_AC_BK, | |
45 | IEEE80211_AC_BK, | |
46 | IEEE80211_AC_BE, | |
47 | IEEE80211_AC_VI, | |
48 | IEEE80211_AC_VI, | |
49 | IEEE80211_AC_VO, | |
50 | IEEE80211_AC_VO, | |
51 | }; | |
52 | ||
5c3d29fc DF |
53 | static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, |
54 | struct ieee80211_tx_info *info, | |
55 | __le16 fc, __le32 *tx_flags) | |
56 | { | |
57 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || | |
58 | info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || | |
59 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
60 | *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; | |
61 | } | |
62 | ||
74bcdb33 WYG |
63 | /* |
64 | * handle build REPLY_TX command notification. | |
65 | */ | |
66 | static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, | |
c6baf7fb JB |
67 | struct sk_buff *skb, |
68 | struct iwl_tx_cmd *tx_cmd, | |
69 | struct ieee80211_tx_info *info, | |
70 | struct ieee80211_hdr *hdr, u8 sta_id) | |
74bcdb33 WYG |
71 | { |
72 | __le16 fc = hdr->frame_control; | |
73 | __le32 tx_flags = tx_cmd->tx_flags; | |
74 | ||
75 | tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
2c2def10 JB |
76 | |
77 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
74bcdb33 | 78 | tx_flags |= TX_CMD_FLG_ACK_MSK; |
2c2def10 JB |
79 | else |
80 | tx_flags &= ~TX_CMD_FLG_ACK_MSK; | |
74bcdb33 | 81 | |
2c2def10 JB |
82 | if (ieee80211_is_probe_resp(fc)) |
83 | tx_flags |= TX_CMD_FLG_TSF_MSK; | |
84 | else if (ieee80211_is_back_req(fc)) | |
74bcdb33 | 85 | tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; |
d44ae69e | 86 | else if (info->band == IEEE80211_BAND_2GHZ && |
2152268f EG |
87 | priv->cfg->bt_params && |
88 | priv->cfg->bt_params->advanced_bt_coexist && | |
d44ae69e JB |
89 | (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || |
90 | ieee80211_is_reassoc_req(fc) || | |
91 | skb->protocol == cpu_to_be16(ETH_P_PAE))) | |
92 | tx_flags |= TX_CMD_FLG_IGNORE_BT; | |
74bcdb33 WYG |
93 | |
94 | ||
c6baf7fb | 95 | tx_cmd->sta_id = sta_id; |
74bcdb33 WYG |
96 | if (ieee80211_has_morefrags(fc)) |
97 | tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; | |
98 | ||
99 | if (ieee80211_is_data_qos(fc)) { | |
100 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
101 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
102 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; | |
103 | } else { | |
3d29dd9b | 104 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; |
123877b8 WYG |
105 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) |
106 | tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; | |
107 | else | |
108 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; | |
74bcdb33 WYG |
109 | } |
110 | ||
5c3d29fc | 111 | iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); |
74bcdb33 WYG |
112 | |
113 | tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); | |
114 | if (ieee80211_is_mgmt(fc)) { | |
115 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
116 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); | |
117 | else | |
118 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); | |
119 | } else { | |
120 | tx_cmd->timeout.pm_frame_timeout = 0; | |
121 | } | |
122 | ||
123 | tx_cmd->driver_txop = 0; | |
124 | tx_cmd->tx_flags = tx_flags; | |
125 | tx_cmd->next_frame_len = 0; | |
126 | } | |
127 | ||
74bcdb33 | 128 | static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, |
c6baf7fb JB |
129 | struct iwl_tx_cmd *tx_cmd, |
130 | struct ieee80211_tx_info *info, | |
131 | __le16 fc) | |
74bcdb33 WYG |
132 | { |
133 | u32 rate_flags; | |
134 | int rate_idx; | |
135 | u8 rts_retry_limit; | |
136 | u8 data_retry_limit; | |
137 | u8 rate_plcp; | |
138 | ||
15b86bff | 139 | if (priv->wowlan) { |
f3129b73 WYG |
140 | rts_retry_limit = IWLAGN_LOW_RETRY_LIMIT; |
141 | data_retry_limit = IWLAGN_LOW_RETRY_LIMIT; | |
142 | } else { | |
143 | /* Set retry limit on RTS packets */ | |
144 | rts_retry_limit = IWLAGN_RTS_DFAULT_RETRY_LIMIT; | |
145 | ||
146 | /* Set retry limit on DATA packets and Probe Responses*/ | |
147 | if (ieee80211_is_probe_resp(fc)) { | |
148 | data_retry_limit = IWLAGN_MGMT_DFAULT_RETRY_LIMIT; | |
149 | rts_retry_limit = | |
150 | min(data_retry_limit, rts_retry_limit); | |
151 | } else if (ieee80211_is_back_req(fc)) | |
152 | data_retry_limit = IWLAGN_BAR_DFAULT_RETRY_LIMIT; | |
153 | else | |
154 | data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; | |
155 | } | |
74bcdb33 | 156 | |
78558cb4 | 157 | tx_cmd->data_retry_limit = data_retry_limit; |
74bcdb33 WYG |
158 | tx_cmd->rts_retry_limit = rts_retry_limit; |
159 | ||
160 | /* DATA packets will use the uCode station table for rate/antenna | |
161 | * selection */ | |
162 | if (ieee80211_is_data(fc)) { | |
163 | tx_cmd->initial_rate_index = 0; | |
164 | tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; | |
5ef15ccc | 165 | #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE |
4e308119 WYG |
166 | if (priv->tm_fixed_rate) { |
167 | /* | |
168 | * rate overwrite by testmode | |
169 | * we not only send lq command to change rate | |
170 | * we also re-enforce per data pkt base. | |
171 | */ | |
172 | tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK; | |
173 | memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate, | |
174 | sizeof(tx_cmd->rate_n_flags)); | |
175 | } | |
c10e2c10 | 176 | #endif |
74bcdb33 | 177 | return; |
b8deb492 WYG |
178 | } else if (ieee80211_is_back_req(fc)) |
179 | tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; | |
74bcdb33 WYG |
180 | |
181 | /** | |
182 | * If the current TX rate stored in mac80211 has the MCS bit set, it's | |
183 | * not really a TX rate. Thus, we use the lowest supported rate for | |
184 | * this band. Also use the lowest supported rate if the stored rate | |
185 | * index is invalid. | |
186 | */ | |
187 | rate_idx = info->control.rates[0].idx; | |
188 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || | |
189 | (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) | |
190 | rate_idx = rate_lowest_index(&priv->bands[info->band], | |
191 | info->control.sta); | |
192 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
193 | if (info->band == IEEE80211_BAND_5GHZ) | |
194 | rate_idx += IWL_FIRST_OFDM_RATE; | |
195 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
196 | rate_plcp = iwl_rates[rate_idx].plcp; | |
197 | /* Zero out flags for this packet */ | |
198 | rate_flags = 0; | |
199 | ||
200 | /* Set CCK flag as needed */ | |
201 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
202 | rate_flags |= RATE_MCS_CCK_MSK; | |
203 | ||
74bcdb33 | 204 | /* Set up antennas */ |
2152268f EG |
205 | if (priv->cfg->bt_params && |
206 | priv->cfg->bt_params->advanced_bt_coexist && | |
7cb1b088 | 207 | priv->bt_full_concurrent) { |
bee008b7 WYG |
208 | /* operated as 1x1 in full concurrency mode */ |
209 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, | |
9e295116 | 210 | first_antenna(priv->hw_params.valid_tx_ant)); |
bee008b7 WYG |
211 | } else |
212 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, | |
9e295116 | 213 | priv->hw_params.valid_tx_ant); |
74bcdb33 WYG |
214 | rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); |
215 | ||
216 | /* Set the rate in the TX cmd */ | |
217 | tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); | |
218 | } | |
219 | ||
220 | static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, | |
f2b69ef0 JB |
221 | struct ieee80211_tx_info *info, |
222 | struct iwl_tx_cmd *tx_cmd, | |
223 | struct sk_buff *skb_frag) | |
74bcdb33 WYG |
224 | { |
225 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
226 | ||
97359d12 JB |
227 | switch (keyconf->cipher) { |
228 | case WLAN_CIPHER_SUITE_CCMP: | |
74bcdb33 WYG |
229 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; |
230 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); | |
231 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
232 | tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; | |
233 | IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); | |
234 | break; | |
235 | ||
97359d12 | 236 | case WLAN_CIPHER_SUITE_TKIP: |
74bcdb33 | 237 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; |
523b02ea | 238 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
74bcdb33 WYG |
239 | IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n"); |
240 | break; | |
241 | ||
97359d12 JB |
242 | case WLAN_CIPHER_SUITE_WEP104: |
243 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
244 | /* fall through */ | |
245 | case WLAN_CIPHER_SUITE_WEP40: | |
74bcdb33 WYG |
246 | tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | |
247 | (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); | |
248 | ||
74bcdb33 WYG |
249 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); |
250 | ||
251 | IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " | |
252 | "with key %d\n", keyconf->keyidx); | |
253 | break; | |
254 | ||
255 | default: | |
97359d12 | 256 | IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); |
74bcdb33 WYG |
257 | break; |
258 | } | |
259 | } | |
260 | ||
955570fc JB |
261 | /** |
262 | * iwl_sta_id_or_broadcast - return sta_id or broadcast sta | |
263 | * @context: the current context | |
264 | * @sta: mac80211 station | |
265 | * | |
266 | * In certain circumstances mac80211 passes a station pointer | |
267 | * that may be %NULL, for example during TX or key setup. In | |
268 | * that case, we need to use the broadcast station, so this | |
269 | * inline wraps that pattern. | |
270 | */ | |
271 | static int iwl_sta_id_or_broadcast(struct iwl_rxon_context *context, | |
272 | struct ieee80211_sta *sta) | |
273 | { | |
274 | int sta_id; | |
275 | ||
276 | if (!sta) | |
277 | return context->bcast_sta_id; | |
278 | ||
279 | sta_id = iwl_sta_id(sta); | |
280 | ||
281 | /* | |
282 | * mac80211 should not be passing a partially | |
283 | * initialised station! | |
284 | */ | |
285 | WARN_ON(sta_id == IWL_INVALID_STATION); | |
286 | ||
287 | return sta_id; | |
288 | } | |
289 | ||
74bcdb33 WYG |
290 | /* |
291 | * start REPLY_TX command process | |
292 | */ | |
293 | int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) | |
294 | { | |
295 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
296 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
74bcdb33 | 297 | struct iwl_station_priv *sta_priv = NULL; |
a194e324 | 298 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
dfa2bdba | 299 | struct iwl_device_cmd *dev_cmd = NULL; |
47c1b496 | 300 | struct iwl_tx_cmd *tx_cmd; |
74bcdb33 WYG |
301 | __le16 fc; |
302 | u8 hdr_len; | |
34b5321e EG |
303 | u16 len, seq_number = 0; |
304 | u8 sta_id, tid = IWL_MAX_TID_COUNT; | |
2e34034e | 305 | bool is_agg = false; |
9eae88fa | 306 | int txq_id; |
74bcdb33 | 307 | |
c6baf7fb | 308 | if (info->control.vif) |
a194e324 JB |
309 | ctx = iwl_rxon_ctx_from_vif(info->control.vif); |
310 | ||
83626404 | 311 | if (iwl_is_rfkill(priv)) { |
74bcdb33 | 312 | IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); |
2c46f72e | 313 | goto drop_unlock_priv; |
74bcdb33 WYG |
314 | } |
315 | ||
316 | fc = hdr->frame_control; | |
317 | ||
318 | #ifdef CONFIG_IWLWIFI_DEBUG | |
319 | if (ieee80211_is_auth(fc)) | |
320 | IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); | |
321 | else if (ieee80211_is_assoc_req(fc)) | |
322 | IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); | |
323 | else if (ieee80211_is_reassoc_req(fc)) | |
324 | IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); | |
325 | #endif | |
326 | ||
79d3eef8 JB |
327 | if (unlikely(ieee80211_is_probe_resp(fc))) { |
328 | struct iwl_wipan_noa_data *noa_data = | |
329 | rcu_dereference(priv->noa_data); | |
330 | ||
331 | if (noa_data && | |
332 | pskb_expand_head(skb, 0, noa_data->length, | |
333 | GFP_ATOMIC) == 0) { | |
334 | memcpy(skb_put(skb, noa_data->length), | |
335 | noa_data->data, noa_data->length); | |
336 | hdr = (struct ieee80211_hdr *)skb->data; | |
337 | } | |
338 | } | |
339 | ||
74bcdb33 WYG |
340 | hdr_len = ieee80211_hdrlen(fc); |
341 | ||
bfd36103 SG |
342 | /* For management frames use broadcast id to do not break aggregation */ |
343 | if (!ieee80211_is_data(fc)) | |
344 | sta_id = ctx->bcast_sta_id; | |
345 | else { | |
346 | /* Find index into station table for destination station */ | |
955570fc | 347 | sta_id = iwl_sta_id_or_broadcast(ctx, info->control.sta); |
bfd36103 SG |
348 | if (sta_id == IWL_INVALID_STATION) { |
349 | IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", | |
350 | hdr->addr1); | |
e00cf3b9 | 351 | goto drop_unlock_priv; |
bfd36103 | 352 | } |
74bcdb33 WYG |
353 | } |
354 | ||
355 | IWL_DEBUG_TX(priv, "station Id %d\n", sta_id); | |
356 | ||
47c1b496 EG |
357 | if (info->control.sta) |
358 | sta_priv = (void *)info->control.sta->drv_priv; | |
74bcdb33 | 359 | |
67158b67 | 360 | if (sta_priv && sta_priv->asleep && |
02f2f1a9 | 361 | (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) { |
74bcdb33 WYG |
362 | /* |
363 | * This sends an asynchronous command to the device, | |
364 | * but we can rely on it being processed before the | |
365 | * next frame is processed -- and the next frame to | |
366 | * this station is the one that will consume this | |
367 | * counter. | |
368 | * For now set the counter to just 1 since we do not | |
369 | * support uAPSD yet. | |
02f2f1a9 JB |
370 | * |
371 | * FIXME: If we get two non-bufferable frames one | |
372 | * after the other, we might only send out one of | |
373 | * them because this is racy. | |
74bcdb33 WYG |
374 | */ |
375 | iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); | |
376 | } | |
377 | ||
08ecf104 EG |
378 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
379 | is_agg = true; | |
380 | ||
354928dd | 381 | dev_cmd = kmem_cache_alloc(iwl_tx_cmd_pool, GFP_ATOMIC); |
dfa2bdba EG |
382 | |
383 | if (unlikely(!dev_cmd)) | |
71cb9924 | 384 | goto drop_unlock_priv; |
74bcdb33 | 385 | |
dfa2bdba | 386 | memset(dev_cmd, 0, sizeof(*dev_cmd)); |
132f98c2 | 387 | tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; |
dfa2bdba | 388 | |
74bcdb33 WYG |
389 | /* Total # bytes to be transmitted */ |
390 | len = (u16)skb->len; | |
391 | tx_cmd->len = cpu_to_le16(len); | |
392 | ||
393 | if (info->control.hw_key) | |
f2b69ef0 | 394 | iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb); |
74bcdb33 WYG |
395 | |
396 | /* TODO need this for burst mode later on */ | |
d44ae69e | 397 | iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); |
74bcdb33 WYG |
398 | |
399 | iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc); | |
400 | ||
1a849613 EG |
401 | memset(&info->status, 0, sizeof(info->status)); |
402 | ||
2c452297 | 403 | info->driver_data[0] = ctx; |
dfa2bdba | 404 | info->driver_data[1] = dev_cmd; |
2c452297 | 405 | |
fa23cb04 | 406 | spin_lock(&priv->sta_lock); |
71cb9924 | 407 | |
34b5321e EG |
408 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { |
409 | u8 *qc = NULL; | |
410 | struct iwl_tid_data *tid_data; | |
411 | qc = ieee80211_get_qos_ctl(hdr); | |
412 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
413 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
414 | goto drop_unlock_sta; | |
04cf6824 | 415 | tid_data = &priv->tid_data[sta_id][tid]; |
34b5321e | 416 | |
97756fb1 EG |
417 | /* aggregation is on for this <sta,tid> */ |
418 | if (info->flags & IEEE80211_TX_CTL_AMPDU && | |
419 | tid_data->agg.state != IWL_AGG_ON) { | |
420 | IWL_ERR(priv, "TX_CTL_AMPDU while not in AGG:" | |
421 | " Tx flags = 0x%08x, agg.state = %d", | |
422 | info->flags, tid_data->agg.state); | |
423 | IWL_ERR(priv, "sta_id = %d, tid = %d seq_num = %d", | |
424 | sta_id, tid, SEQ_TO_SN(tid_data->seq_number)); | |
425 | goto drop_unlock_sta; | |
426 | } | |
427 | ||
b5326db8 EG |
428 | /* We can receive packets from the stack in IWL_AGG_{ON,OFF} |
429 | * only. Check this here. | |
430 | */ | |
431 | if (WARN_ONCE(tid_data->agg.state != IWL_AGG_ON && | |
432 | tid_data->agg.state != IWL_AGG_OFF, | |
433 | "Tx while agg.state = %d", tid_data->agg.state)) | |
434 | goto drop_unlock_sta; | |
435 | ||
34b5321e EG |
436 | seq_number = tid_data->seq_number; |
437 | seq_number &= IEEE80211_SCTL_SEQ; | |
438 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
439 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
440 | seq_number += 0x10; | |
441 | } | |
442 | ||
443 | /* Copy MAC header from skb into command buffer */ | |
444 | memcpy(tx_cmd->hdr, hdr, hdr_len); | |
445 | ||
9eae88fa JB |
446 | if (is_agg) |
447 | txq_id = priv->tid_data[sta_id][tid].agg.txq_id; | |
448 | else if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { | |
449 | /* | |
450 | * Send this frame after DTIM -- there's a special queue | |
451 | * reserved for this for contexts that support AP mode. | |
452 | */ | |
453 | txq_id = ctx->mcast_queue; | |
454 | ||
455 | /* | |
456 | * The microcode will clear the more data | |
457 | * bit in the last frame it transmits. | |
458 | */ | |
459 | hdr->frame_control |= | |
460 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
461 | } else if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) | |
462 | txq_id = IWL_AUX_QUEUE; | |
463 | else | |
464 | txq_id = ctx->ac_to_queue[skb_get_queue_mapping(skb)]; | |
465 | ||
1479177b JB |
466 | WARN_ON_ONCE(!is_agg && txq_id != info->hw_queue); |
467 | WARN_ON_ONCE(is_agg && | |
468 | priv->queue_to_mac80211[txq_id] != info->hw_queue); | |
469 | ||
68e8dfda | 470 | if (iwl_trans_tx(priv->trans, skb, dev_cmd, txq_id)) |
47c1b496 | 471 | goto drop_unlock_sta; |
2c46f72e | 472 | |
34b5321e EG |
473 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc) && |
474 | !ieee80211_has_morefrags(fc)) | |
04cf6824 | 475 | priv->tid_data[sta_id][tid].seq_number = seq_number; |
34b5321e | 476 | |
fa23cb04 | 477 | spin_unlock(&priv->sta_lock); |
74bcdb33 | 478 | |
2e34034e JB |
479 | /* |
480 | * Avoid atomic ops if it isn't an associated client. | |
481 | * Also, if this is a packet for aggregation, don't | |
482 | * increase the counter because the ucode will stop | |
483 | * aggregation queues when their respective station | |
484 | * goes to sleep. | |
485 | */ | |
486 | if (sta_priv && sta_priv->client && !is_agg) | |
74bcdb33 WYG |
487 | atomic_inc(&sta_priv->pending_frames); |
488 | ||
622a9268 IP |
489 | if (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) |
490 | iwl_scan_offchannel_skb(priv); | |
491 | ||
74bcdb33 WYG |
492 | return 0; |
493 | ||
2c46f72e | 494 | drop_unlock_sta: |
dfa2bdba | 495 | if (dev_cmd) |
354928dd | 496 | kmem_cache_free(iwl_tx_cmd_pool, dev_cmd); |
fa23cb04 | 497 | spin_unlock(&priv->sta_lock); |
2c46f72e | 498 | drop_unlock_priv: |
74bcdb33 WYG |
499 | return -1; |
500 | } | |
501 | ||
1479177b | 502 | static int iwlagn_alloc_agg_txq(struct iwl_priv *priv, int mq) |
9eae88fa JB |
503 | { |
504 | int q; | |
505 | ||
506 | for (q = IWLAGN_FIRST_AMPDU_QUEUE; | |
2152268f | 507 | q < priv->cfg->base_params->num_of_queues; q++) { |
9eae88fa | 508 | if (!test_and_set_bit(q, priv->agg_q_alloc)) { |
1479177b | 509 | priv->queue_to_mac80211[q] = mq; |
9eae88fa JB |
510 | return q; |
511 | } | |
512 | } | |
513 | ||
514 | return -ENOSPC; | |
515 | } | |
516 | ||
517 | static void iwlagn_dealloc_agg_txq(struct iwl_priv *priv, int q) | |
518 | { | |
519 | clear_bit(q, priv->agg_q_alloc); | |
1479177b | 520 | priv->queue_to_mac80211[q] = IWL_INVALID_MAC80211_QUEUE; |
9eae88fa JB |
521 | } |
522 | ||
bc237730 EG |
523 | int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, |
524 | struct ieee80211_sta *sta, u16 tid) | |
525 | { | |
bc237730 | 526 | struct iwl_tid_data *tid_data; |
9eae88fa | 527 | int sta_id, txq_id; |
682e5f64 | 528 | enum iwl_agg_state agg_state; |
bc237730 EG |
529 | |
530 | sta_id = iwl_sta_id(sta); | |
531 | ||
532 | if (sta_id == IWL_INVALID_STATION) { | |
533 | IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); | |
534 | return -ENXIO; | |
535 | } | |
536 | ||
fa23cb04 | 537 | spin_lock_bh(&priv->sta_lock); |
bc237730 | 538 | |
04cf6824 | 539 | tid_data = &priv->tid_data[sta_id][tid]; |
9eae88fa | 540 | txq_id = priv->tid_data[sta_id][tid].agg.txq_id; |
bc237730 | 541 | |
04cf6824 | 542 | switch (priv->tid_data[sta_id][tid].agg.state) { |
bc237730 EG |
543 | case IWL_EMPTYING_HW_QUEUE_ADDBA: |
544 | /* | |
545 | * This can happen if the peer stops aggregation | |
546 | * again before we've had a chance to drain the | |
547 | * queue we selected previously, i.e. before the | |
548 | * session was really started completely. | |
549 | */ | |
550 | IWL_DEBUG_HT(priv, "AGG stop before setup done\n"); | |
551 | goto turn_off; | |
682e5f64 EG |
552 | case IWL_AGG_STARTING: |
553 | /* | |
554 | * This can happen when the session is stopped before | |
555 | * we receive ADDBA response | |
556 | */ | |
557 | IWL_DEBUG_HT(priv, "AGG stop before AGG became operational\n"); | |
558 | goto turn_off; | |
bc237730 EG |
559 | case IWL_AGG_ON: |
560 | break; | |
561 | default: | |
562 | IWL_WARN(priv, "Stopping AGG while state not ON " | |
563 | "or starting for %d on %d (%d)\n", sta_id, tid, | |
04cf6824 | 564 | priv->tid_data[sta_id][tid].agg.state); |
fa23cb04 | 565 | spin_unlock_bh(&priv->sta_lock); |
bc237730 EG |
566 | return 0; |
567 | } | |
568 | ||
569 | tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number); | |
570 | ||
571 | /* There are still packets for this RA / TID in the HW */ | |
9eae88fa JB |
572 | if (!test_bit(txq_id, priv->agg_q_alloc)) { |
573 | IWL_DEBUG_TX_QUEUES(priv, | |
574 | "stopping AGG on STA/TID %d/%d but hwq %d not used\n", | |
575 | sta_id, tid, txq_id); | |
576 | } else if (tid_data->agg.ssn != tid_data->next_reclaimed) { | |
bc237730 | 577 | IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " |
9eae88fa | 578 | "next_recl = %d\n", |
bc237730 EG |
579 | tid_data->agg.ssn, |
580 | tid_data->next_reclaimed); | |
04cf6824 | 581 | priv->tid_data[sta_id][tid].agg.state = |
bc237730 | 582 | IWL_EMPTYING_HW_QUEUE_DELBA; |
fa23cb04 | 583 | spin_unlock_bh(&priv->sta_lock); |
bc237730 EG |
584 | return 0; |
585 | } | |
586 | ||
0ca24daf | 587 | IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", |
bc237730 EG |
588 | tid_data->agg.ssn); |
589 | turn_off: | |
682e5f64 | 590 | agg_state = priv->tid_data[sta_id][tid].agg.state; |
04cf6824 | 591 | priv->tid_data[sta_id][tid].agg.state = IWL_AGG_OFF; |
bc237730 | 592 | |
fa23cb04 | 593 | spin_unlock_bh(&priv->sta_lock); |
bc237730 | 594 | |
9eae88fa | 595 | if (test_bit(txq_id, priv->agg_q_alloc)) { |
8ff44ef2 EG |
596 | /* |
597 | * If the transport didn't know that we wanted to start | |
598 | * agreggation, don't tell it that we want to stop them. | |
599 | * This can happen when we don't get the addBA response on | |
600 | * time, or we hadn't time to drain the AC queues. | |
682e5f64 | 601 | */ |
8ff44ef2 | 602 | if (agg_state == IWL_AGG_ON) |
682e5f64 | 603 | iwl_trans_tx_agg_disable(priv->trans, txq_id); |
8ff44ef2 EG |
604 | else |
605 | IWL_DEBUG_TX_QUEUES(priv, "Don't disable tx agg: %d\n", | |
606 | agg_state); | |
9eae88fa JB |
607 | iwlagn_dealloc_agg_txq(priv, txq_id); |
608 | } | |
bc237730 | 609 | |
fdf426a3 | 610 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
bc237730 EG |
611 | |
612 | return 0; | |
613 | } | |
614 | ||
832f47e3 | 615 | int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, |
619753ff | 616 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) |
74bcdb33 | 617 | { |
1479177b | 618 | struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); |
3c69b595 | 619 | struct iwl_tid_data *tid_data; |
9eae88fa | 620 | int sta_id, txq_id, ret; |
74bcdb33 | 621 | |
5bc9890f WYG |
622 | IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", |
623 | sta->addr, tid); | |
74bcdb33 | 624 | |
619753ff | 625 | sta_id = iwl_sta_id(sta); |
74bcdb33 WYG |
626 | if (sta_id == IWL_INVALID_STATION) { |
627 | IWL_ERR(priv, "Start AGG on invalid station\n"); | |
628 | return -ENXIO; | |
629 | } | |
5f85a789 | 630 | if (unlikely(tid >= IWL_MAX_TID_COUNT)) |
74bcdb33 WYG |
631 | return -EINVAL; |
632 | ||
04cf6824 | 633 | if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { |
74bcdb33 WYG |
634 | IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); |
635 | return -ENXIO; | |
636 | } | |
637 | ||
1479177b | 638 | txq_id = iwlagn_alloc_agg_txq(priv, ctx->ac_to_queue[tid_to_ac[tid]]); |
9eae88fa JB |
639 | if (txq_id < 0) { |
640 | IWL_DEBUG_TX_QUEUES(priv, | |
641 | "No free aggregation queue for %pM/%d\n", | |
642 | sta->addr, tid); | |
643 | return txq_id; | |
644 | } | |
645 | ||
288712a6 | 646 | ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); |
74bcdb33 WYG |
647 | if (ret) |
648 | return ret; | |
649 | ||
fa23cb04 | 650 | spin_lock_bh(&priv->sta_lock); |
04cf6824 | 651 | tid_data = &priv->tid_data[sta_id][tid]; |
3c69b595 | 652 | tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number); |
9eae88fa | 653 | tid_data->agg.txq_id = txq_id; |
3c69b595 EG |
654 | |
655 | *ssn = tid_data->agg.ssn; | |
656 | ||
3c69b595 | 657 | if (*ssn == tid_data->next_reclaimed) { |
0ca24daf | 658 | IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d\n", |
3c69b595 | 659 | tid_data->agg.ssn); |
682e5f64 | 660 | tid_data->agg.state = IWL_AGG_STARTING; |
fdf426a3 | 661 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
3c69b595 EG |
662 | } else { |
663 | IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, " | |
0ca24daf | 664 | "next_reclaimed = %d\n", |
3c69b595 EG |
665 | tid_data->agg.ssn, |
666 | tid_data->next_reclaimed); | |
667 | tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; | |
668 | } | |
fa23cb04 | 669 | spin_unlock_bh(&priv->sta_lock); |
288712a6 | 670 | |
74bcdb33 WYG |
671 | return ret; |
672 | } | |
673 | ||
822e8b2a EG |
674 | int iwlagn_tx_agg_oper(struct iwl_priv *priv, struct ieee80211_vif *vif, |
675 | struct ieee80211_sta *sta, u16 tid, u8 buf_size) | |
676 | { | |
677 | struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; | |
678 | struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); | |
9eae88fa | 679 | int q, fifo; |
822e8b2a EG |
680 | u16 ssn; |
681 | ||
682 | buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); | |
683 | ||
fa23cb04 | 684 | spin_lock_bh(&priv->sta_lock); |
04cf6824 | 685 | ssn = priv->tid_data[sta_priv->sta_id][tid].agg.ssn; |
9eae88fa | 686 | q = priv->tid_data[sta_priv->sta_id][tid].agg.txq_id; |
682e5f64 | 687 | priv->tid_data[sta_priv->sta_id][tid].agg.state = IWL_AGG_ON; |
fa23cb04 | 688 | spin_unlock_bh(&priv->sta_lock); |
822e8b2a | 689 | |
9eae88fa JB |
690 | fifo = ctx->ac_to_fifo[tid_to_ac[tid]]; |
691 | ||
68e8dfda | 692 | iwl_trans_tx_agg_setup(priv->trans, q, fifo, |
9eae88fa | 693 | sta_priv->sta_id, tid, |
822e8b2a EG |
694 | buf_size, ssn); |
695 | ||
696 | /* | |
697 | * If the limit is 0, then it wasn't initialised yet, | |
698 | * use the default. We can do that since we take the | |
699 | * minimum below, and we don't want to go above our | |
700 | * default due to hardware restrictions. | |
701 | */ | |
702 | if (sta_priv->max_agg_bufsize == 0) | |
703 | sta_priv->max_agg_bufsize = | |
704 | LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
705 | ||
706 | /* | |
707 | * Even though in theory the peer could have different | |
708 | * aggregation reorder buffer sizes for different sessions, | |
709 | * our ucode doesn't allow for that and has a global limit | |
710 | * for each station. Therefore, use the minimum of all the | |
711 | * aggregation sessions and our default value. | |
712 | */ | |
713 | sta_priv->max_agg_bufsize = | |
714 | min(sta_priv->max_agg_bufsize, buf_size); | |
715 | ||
9e295116 | 716 | if (priv->hw_params.use_rts_for_aggregation) { |
822e8b2a EG |
717 | /* |
718 | * switch to RTS/CTS if it is the prefer protection | |
719 | * method for HT traffic | |
720 | */ | |
721 | ||
722 | sta_priv->lq_sta.lq.general_params.flags |= | |
723 | LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; | |
724 | } | |
725 | priv->agg_tids_count++; | |
726 | IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", | |
727 | priv->agg_tids_count); | |
728 | ||
729 | sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit = | |
730 | sta_priv->max_agg_bufsize; | |
731 | ||
5fb8c182 | 732 | IWL_DEBUG_HT(priv, "Tx aggregation enabled on ra = %pM tid = %d\n", |
822e8b2a EG |
733 | sta->addr, tid); |
734 | ||
735 | return iwl_send_lq_cmd(priv, ctx, | |
736 | &sta_priv->lq_sta.lq, CMD_ASYNC, false); | |
737 | } | |
738 | ||
20addec6 EG |
739 | static void iwlagn_check_ratid_empty(struct iwl_priv *priv, int sta_id, u8 tid) |
740 | { | |
04cf6824 | 741 | struct iwl_tid_data *tid_data = &priv->tid_data[sta_id][tid]; |
fdf426a3 EG |
742 | enum iwl_rxon_context_id ctx; |
743 | struct ieee80211_vif *vif; | |
744 | u8 *addr; | |
20addec6 | 745 | |
fa23cb04 | 746 | lockdep_assert_held(&priv->sta_lock); |
20addec6 | 747 | |
fdf426a3 EG |
748 | addr = priv->stations[sta_id].sta.sta.addr; |
749 | ctx = priv->stations[sta_id].ctxid; | |
750 | vif = priv->contexts[ctx].vif; | |
751 | ||
04cf6824 | 752 | switch (priv->tid_data[sta_id][tid].agg.state) { |
20addec6 EG |
753 | case IWL_EMPTYING_HW_QUEUE_DELBA: |
754 | /* There are no packets for this RA / TID in the HW any more */ | |
755 | if (tid_data->agg.ssn == tid_data->next_reclaimed) { | |
756 | IWL_DEBUG_TX_QUEUES(priv, | |
757 | "Can continue DELBA flow ssn = next_recl =" | |
758 | " %d", tid_data->next_reclaimed); | |
68e8dfda | 759 | iwl_trans_tx_agg_disable(priv->trans, |
9eae88fa JB |
760 | tid_data->agg.txq_id); |
761 | iwlagn_dealloc_agg_txq(priv, tid_data->agg.txq_id); | |
20addec6 | 762 | tid_data->agg.state = IWL_AGG_OFF; |
fdf426a3 | 763 | ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid); |
20addec6 EG |
764 | } |
765 | break; | |
766 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
767 | /* There are no packets for this RA / TID in the HW any more */ | |
768 | if (tid_data->agg.ssn == tid_data->next_reclaimed) { | |
769 | IWL_DEBUG_TX_QUEUES(priv, | |
770 | "Can continue ADDBA flow ssn = next_recl =" | |
771 | " %d", tid_data->next_reclaimed); | |
682e5f64 | 772 | tid_data->agg.state = IWL_AGG_STARTING; |
fdf426a3 | 773 | ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid); |
20addec6 EG |
774 | } |
775 | break; | |
776 | default: | |
777 | break; | |
778 | } | |
779 | } | |
780 | ||
2e34034e JB |
781 | static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, |
782 | struct iwl_rxon_context *ctx, | |
783 | const u8 *addr1) | |
74bcdb33 | 784 | { |
74bcdb33 WYG |
785 | struct ieee80211_sta *sta; |
786 | struct iwl_station_priv *sta_priv; | |
787 | ||
6db6340c | 788 | rcu_read_lock(); |
2e34034e | 789 | sta = ieee80211_find_sta(ctx->vif, addr1); |
74bcdb33 WYG |
790 | if (sta) { |
791 | sta_priv = (void *)sta->drv_priv; | |
792 | /* avoid atomic ops if this isn't a client */ | |
793 | if (sta_priv->client && | |
794 | atomic_dec_return(&sta_priv->pending_frames) == 0) | |
795 | ieee80211_sta_block_awake(priv->hw, sta, false); | |
796 | } | |
6db6340c | 797 | rcu_read_unlock(); |
2e34034e JB |
798 | } |
799 | ||
a0eaad71 EG |
800 | /** |
801 | * translate ucode response to mac80211 tx status control values | |
802 | */ | |
04e1cabe | 803 | static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, |
a0eaad71 | 804 | struct ieee80211_tx_info *info) |
2e34034e | 805 | { |
d748b464 | 806 | struct ieee80211_tx_rate *r = &info->status.rates[0]; |
74bcdb33 | 807 | |
d748b464 | 808 | info->status.antenna = |
a0eaad71 EG |
809 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); |
810 | if (rate_n_flags & RATE_MCS_HT_MSK) | |
811 | r->flags |= IEEE80211_TX_RC_MCS; | |
812 | if (rate_n_flags & RATE_MCS_GF_MSK) | |
813 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
814 | if (rate_n_flags & RATE_MCS_HT40_MSK) | |
815 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
816 | if (rate_n_flags & RATE_MCS_DUP_MSK) | |
817 | r->flags |= IEEE80211_TX_RC_DUP_DATA; | |
818 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
819 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
820 | r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); | |
74bcdb33 WYG |
821 | } |
822 | ||
a0eaad71 EG |
823 | #ifdef CONFIG_IWLWIFI_DEBUG |
824 | const char *iwl_get_tx_fail_reason(u32 status) | |
74bcdb33 | 825 | { |
a0eaad71 EG |
826 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x |
827 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
74bcdb33 | 828 | |
a0eaad71 EG |
829 | switch (status & TX_STATUS_MSK) { |
830 | case TX_STATUS_SUCCESS: | |
831 | return "SUCCESS"; | |
832 | TX_STATUS_POSTPONE(DELAY); | |
833 | TX_STATUS_POSTPONE(FEW_BYTES); | |
834 | TX_STATUS_POSTPONE(BT_PRIO); | |
835 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
836 | TX_STATUS_POSTPONE(CALC_TTAK); | |
837 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
838 | TX_STATUS_FAIL(SHORT_LIMIT); | |
839 | TX_STATUS_FAIL(LONG_LIMIT); | |
840 | TX_STATUS_FAIL(FIFO_UNDERRUN); | |
841 | TX_STATUS_FAIL(DRAIN_FLOW); | |
842 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
843 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
844 | TX_STATUS_FAIL(DEST_PS); | |
845 | TX_STATUS_FAIL(HOST_ABORTED); | |
846 | TX_STATUS_FAIL(BT_RETRY); | |
847 | TX_STATUS_FAIL(STA_INVALID); | |
848 | TX_STATUS_FAIL(FRAG_DROPPED); | |
849 | TX_STATUS_FAIL(TID_DISABLE); | |
850 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
851 | TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); | |
852 | TX_STATUS_FAIL(PASSIVE_NO_RX); | |
853 | TX_STATUS_FAIL(NO_BEACON_ON_RADAR); | |
74bcdb33 WYG |
854 | } |
855 | ||
a0eaad71 | 856 | return "UNKNOWN"; |
74bcdb33 | 857 | |
a0eaad71 EG |
858 | #undef TX_STATUS_FAIL |
859 | #undef TX_STATUS_POSTPONE | |
860 | } | |
861 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
b2502698 | 862 | |
04e1cabe EG |
863 | static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) |
864 | { | |
865 | status &= AGG_TX_STATUS_MSK; | |
866 | ||
867 | switch (status) { | |
868 | case AGG_TX_STATE_UNDERRUN_MSK: | |
869 | priv->reply_agg_tx_stats.underrun++; | |
870 | break; | |
871 | case AGG_TX_STATE_BT_PRIO_MSK: | |
872 | priv->reply_agg_tx_stats.bt_prio++; | |
873 | break; | |
874 | case AGG_TX_STATE_FEW_BYTES_MSK: | |
875 | priv->reply_agg_tx_stats.few_bytes++; | |
876 | break; | |
877 | case AGG_TX_STATE_ABORT_MSK: | |
878 | priv->reply_agg_tx_stats.abort++; | |
879 | break; | |
880 | case AGG_TX_STATE_LAST_SENT_TTL_MSK: | |
881 | priv->reply_agg_tx_stats.last_sent_ttl++; | |
882 | break; | |
883 | case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: | |
884 | priv->reply_agg_tx_stats.last_sent_try++; | |
885 | break; | |
886 | case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: | |
887 | priv->reply_agg_tx_stats.last_sent_bt_kill++; | |
888 | break; | |
889 | case AGG_TX_STATE_SCD_QUERY_MSK: | |
890 | priv->reply_agg_tx_stats.scd_query++; | |
891 | break; | |
892 | case AGG_TX_STATE_TEST_BAD_CRC32_MSK: | |
893 | priv->reply_agg_tx_stats.bad_crc32++; | |
894 | break; | |
895 | case AGG_TX_STATE_RESPONSE_MSK: | |
896 | priv->reply_agg_tx_stats.response++; | |
897 | break; | |
898 | case AGG_TX_STATE_DUMP_TX_MSK: | |
899 | priv->reply_agg_tx_stats.dump_tx++; | |
900 | break; | |
901 | case AGG_TX_STATE_DELAY_TX_MSK: | |
902 | priv->reply_agg_tx_stats.delay_tx++; | |
903 | break; | |
904 | default: | |
905 | priv->reply_agg_tx_stats.unknown++; | |
906 | break; | |
907 | } | |
908 | } | |
909 | ||
a0eaad71 EG |
910 | static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, |
911 | struct iwlagn_tx_resp *tx_resp) | |
912 | { | |
913 | struct agg_tx_status *frame_status = &tx_resp->status; | |
914 | int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> | |
915 | IWLAGN_TX_RES_TID_POS; | |
916 | int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> | |
917 | IWLAGN_TX_RES_RA_POS; | |
04cf6824 | 918 | struct iwl_ht_agg *agg = &priv->tid_data[sta_id][tid].agg; |
a0eaad71 EG |
919 | u32 status = le16_to_cpu(tx_resp->status.status); |
920 | int i; | |
921 | ||
3d29dd9b EG |
922 | WARN_ON(tid == IWL_TID_NON_QOS); |
923 | ||
a0eaad71 EG |
924 | if (agg->wait_for_ba) |
925 | IWL_DEBUG_TX_REPLY(priv, | |
926 | "got tx response w/o block-ack\n"); | |
74bcdb33 | 927 | |
a0eaad71 EG |
928 | agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); |
929 | agg->wait_for_ba = (tx_resp->frame_count > 1); | |
930 | ||
931 | /* | |
932 | * If the BT kill count is non-zero, we'll get this | |
933 | * notification again. | |
934 | */ | |
935 | if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && | |
2152268f EG |
936 | priv->cfg->bt_params && |
937 | priv->cfg->bt_params->advanced_bt_coexist) { | |
a0eaad71 EG |
938 | IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); |
939 | } | |
b2502698 | 940 | |
1a849613 EG |
941 | if (tx_resp->frame_count == 1) |
942 | return; | |
943 | ||
a0eaad71 EG |
944 | /* Construct bit-map of pending frames within Tx window */ |
945 | for (i = 0; i < tx_resp->frame_count; i++) { | |
946 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
74bcdb33 | 947 | |
a0eaad71 EG |
948 | if (status & AGG_TX_STATUS_MSK) |
949 | iwlagn_count_agg_tx_err_status(priv, fstatus); | |
74bcdb33 | 950 | |
a0eaad71 EG |
951 | if (status & (AGG_TX_STATE_FEW_BYTES_MSK | |
952 | AGG_TX_STATE_ABORT_MSK)) | |
953 | continue; | |
954 | ||
955 | IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), " | |
956 | "try-count (0x%08x)\n", | |
957 | iwl_get_agg_tx_fail_reason(fstatus), | |
958 | fstatus & AGG_TX_STATUS_MSK, | |
959 | fstatus & AGG_TX_TRY_MSK); | |
74bcdb33 | 960 | } |
74bcdb33 WYG |
961 | } |
962 | ||
04e1cabe EG |
963 | #ifdef CONFIG_IWLWIFI_DEBUG |
964 | #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x | |
965 | ||
966 | const char *iwl_get_agg_tx_fail_reason(u16 status) | |
967 | { | |
968 | status &= AGG_TX_STATUS_MSK; | |
969 | switch (status) { | |
970 | case AGG_TX_STATE_TRANSMITTED: | |
971 | return "SUCCESS"; | |
972 | AGG_TX_STATE_FAIL(UNDERRUN_MSK); | |
973 | AGG_TX_STATE_FAIL(BT_PRIO_MSK); | |
974 | AGG_TX_STATE_FAIL(FEW_BYTES_MSK); | |
975 | AGG_TX_STATE_FAIL(ABORT_MSK); | |
976 | AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); | |
977 | AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); | |
978 | AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); | |
979 | AGG_TX_STATE_FAIL(SCD_QUERY_MSK); | |
980 | AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); | |
981 | AGG_TX_STATE_FAIL(RESPONSE_MSK); | |
982 | AGG_TX_STATE_FAIL(DUMP_TX_MSK); | |
983 | AGG_TX_STATE_FAIL(DELAY_TX_MSK); | |
984 | } | |
985 | ||
986 | return "UNKNOWN"; | |
987 | } | |
988 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
989 | ||
a0eaad71 EG |
990 | static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) |
991 | { | |
992 | return le32_to_cpup((__le32 *)&tx_resp->status + | |
993 | tx_resp->frame_count) & MAX_SN; | |
994 | } | |
74bcdb33 | 995 | |
04e1cabe EG |
996 | static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) |
997 | { | |
998 | status &= TX_STATUS_MSK; | |
999 | ||
1000 | switch (status) { | |
1001 | case TX_STATUS_POSTPONE_DELAY: | |
1002 | priv->reply_tx_stats.pp_delay++; | |
1003 | break; | |
1004 | case TX_STATUS_POSTPONE_FEW_BYTES: | |
1005 | priv->reply_tx_stats.pp_few_bytes++; | |
1006 | break; | |
1007 | case TX_STATUS_POSTPONE_BT_PRIO: | |
1008 | priv->reply_tx_stats.pp_bt_prio++; | |
1009 | break; | |
1010 | case TX_STATUS_POSTPONE_QUIET_PERIOD: | |
1011 | priv->reply_tx_stats.pp_quiet_period++; | |
1012 | break; | |
1013 | case TX_STATUS_POSTPONE_CALC_TTAK: | |
1014 | priv->reply_tx_stats.pp_calc_ttak++; | |
1015 | break; | |
1016 | case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: | |
1017 | priv->reply_tx_stats.int_crossed_retry++; | |
1018 | break; | |
1019 | case TX_STATUS_FAIL_SHORT_LIMIT: | |
1020 | priv->reply_tx_stats.short_limit++; | |
1021 | break; | |
1022 | case TX_STATUS_FAIL_LONG_LIMIT: | |
1023 | priv->reply_tx_stats.long_limit++; | |
1024 | break; | |
1025 | case TX_STATUS_FAIL_FIFO_UNDERRUN: | |
1026 | priv->reply_tx_stats.fifo_underrun++; | |
1027 | break; | |
1028 | case TX_STATUS_FAIL_DRAIN_FLOW: | |
1029 | priv->reply_tx_stats.drain_flow++; | |
1030 | break; | |
1031 | case TX_STATUS_FAIL_RFKILL_FLUSH: | |
1032 | priv->reply_tx_stats.rfkill_flush++; | |
1033 | break; | |
1034 | case TX_STATUS_FAIL_LIFE_EXPIRE: | |
1035 | priv->reply_tx_stats.life_expire++; | |
1036 | break; | |
1037 | case TX_STATUS_FAIL_DEST_PS: | |
1038 | priv->reply_tx_stats.dest_ps++; | |
1039 | break; | |
1040 | case TX_STATUS_FAIL_HOST_ABORTED: | |
1041 | priv->reply_tx_stats.host_abort++; | |
1042 | break; | |
1043 | case TX_STATUS_FAIL_BT_RETRY: | |
1044 | priv->reply_tx_stats.bt_retry++; | |
1045 | break; | |
1046 | case TX_STATUS_FAIL_STA_INVALID: | |
1047 | priv->reply_tx_stats.sta_invalid++; | |
1048 | break; | |
1049 | case TX_STATUS_FAIL_FRAG_DROPPED: | |
1050 | priv->reply_tx_stats.frag_drop++; | |
1051 | break; | |
1052 | case TX_STATUS_FAIL_TID_DISABLE: | |
1053 | priv->reply_tx_stats.tid_disable++; | |
1054 | break; | |
1055 | case TX_STATUS_FAIL_FIFO_FLUSHED: | |
1056 | priv->reply_tx_stats.fifo_flush++; | |
1057 | break; | |
1058 | case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: | |
1059 | priv->reply_tx_stats.insuff_cf_poll++; | |
1060 | break; | |
1061 | case TX_STATUS_FAIL_PASSIVE_NO_RX: | |
1062 | priv->reply_tx_stats.fail_hw_drop++; | |
1063 | break; | |
1064 | case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: | |
1065 | priv->reply_tx_stats.sta_color_mismatch++; | |
1066 | break; | |
1067 | default: | |
1068 | priv->reply_tx_stats.unknown++; | |
1069 | break; | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | static void iwlagn_set_tx_status(struct iwl_priv *priv, | |
1074 | struct ieee80211_tx_info *info, | |
1075 | struct iwlagn_tx_resp *tx_resp, | |
1076 | bool is_agg) | |
1077 | { | |
1078 | u16 status = le16_to_cpu(tx_resp->status.status); | |
1079 | ||
1080 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
1081 | if (is_agg) | |
1082 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
1083 | info->flags |= iwl_tx_status_to_mac80211(status); | |
1084 | iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), | |
1085 | info); | |
1086 | if (!iwl_is_tx_success(status)) | |
1087 | iwlagn_count_tx_err_status(priv, status); | |
1088 | } | |
1089 | ||
1090 | static void iwl_check_abort_status(struct iwl_priv *priv, | |
1091 | u8 frame_count, u32 status) | |
1092 | { | |
1093 | if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { | |
1094 | IWL_ERR(priv, "Tx flush command to flush out all frames\n"); | |
83626404 | 1095 | if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) |
1ee158d8 | 1096 | queue_work(priv->workqueue, &priv->tx_flush); |
04e1cabe EG |
1097 | } |
1098 | } | |
1099 | ||
9eae88fa JB |
1100 | static int iwl_reclaim(struct iwl_priv *priv, int sta_id, int tid, |
1101 | int txq_id, int ssn, struct sk_buff_head *skbs) | |
1102 | { | |
1103 | if (unlikely(txq_id >= IWLAGN_FIRST_AMPDU_QUEUE && | |
1104 | tid != IWL_TID_NON_QOS && | |
1105 | txq_id != priv->tid_data[sta_id][tid].agg.txq_id)) { | |
1106 | /* | |
1107 | * FIXME: this is a uCode bug which need to be addressed, | |
1108 | * log the information and return for now. | |
1109 | * Since it is can possibly happen very often and in order | |
1110 | * not to fill the syslog, don't use IWL_ERR or IWL_WARN | |
1111 | */ | |
1112 | IWL_DEBUG_TX_QUEUES(priv, | |
1113 | "Bad queue mapping txq_id=%d, agg_txq[sta:%d,tid:%d]=%d\n", | |
1114 | txq_id, sta_id, tid, | |
1115 | priv->tid_data[sta_id][tid].agg.txq_id); | |
1116 | return 1; | |
1117 | } | |
1118 | ||
68e8dfda | 1119 | iwl_trans_reclaim(priv->trans, txq_id, ssn, skbs); |
9eae88fa JB |
1120 | return 0; |
1121 | } | |
1122 | ||
48a2d66f | 1123 | int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb, |
247c61d6 | 1124 | struct iwl_device_cmd *cmd) |
74bcdb33 | 1125 | { |
a0eaad71 EG |
1126 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
1127 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
1128 | int txq_id = SEQ_TO_QUEUE(sequence); | |
ff620849 | 1129 | int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence); |
f8d7c1a1 | 1130 | struct iwlagn_tx_resp *tx_resp = (void *)pkt->data; |
a0eaad71 EG |
1131 | struct ieee80211_hdr *hdr; |
1132 | u32 status = le16_to_cpu(tx_resp->status.status); | |
eb9a372a | 1133 | u16 ssn = iwlagn_get_scd_ssn(tx_resp); |
a0eaad71 EG |
1134 | int tid; |
1135 | int sta_id; | |
1136 | int freed; | |
74bcdb33 | 1137 | struct ieee80211_tx_info *info; |
a0eaad71 EG |
1138 | struct sk_buff_head skbs; |
1139 | struct sk_buff *skb; | |
1140 | struct iwl_rxon_context *ctx; | |
8ad71bef | 1141 | bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); |
622a9268 | 1142 | bool is_offchannel_skb; |
d0eb6334 | 1143 | |
a0eaad71 EG |
1144 | tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> |
1145 | IWLAGN_TX_RES_TID_POS; | |
1146 | sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> | |
1147 | IWLAGN_TX_RES_RA_POS; | |
9decde95 | 1148 | |
fa23cb04 | 1149 | spin_lock(&priv->sta_lock); |
9decde95 | 1150 | |
8ad71bef | 1151 | if (is_agg) |
a0eaad71 EG |
1152 | iwl_rx_reply_tx_agg(priv, tx_resp); |
1153 | ||
2c6ab7ff JB |
1154 | __skb_queue_head_init(&skbs); |
1155 | ||
622a9268 IP |
1156 | is_offchannel_skb = false; |
1157 | ||
a0eaad71 | 1158 | if (tx_resp->frame_count == 1) { |
eb9a372a EG |
1159 | u16 next_reclaimed = le16_to_cpu(tx_resp->seq_ctl); |
1160 | next_reclaimed = SEQ_TO_SN(next_reclaimed + 0x10); | |
1161 | ||
1162 | if (is_agg) { | |
1163 | /* If this is an aggregation queue, we can rely on the | |
1164 | * ssn since the wifi sequence number corresponds to | |
1165 | * the index in the TFD ring (%256). | |
1166 | * The seq_ctl is the sequence control of the packet | |
1167 | * to which this Tx response relates. But if there is a | |
1168 | * hole in the bitmap of the BA we received, this Tx | |
1169 | * response may allow to reclaim the hole and all the | |
1170 | * subsequent packets that were already acked. | |
1171 | * In that case, seq_ctl != ssn, and the next packet | |
1172 | * to be reclaimed will be ssn and not seq_ctl. | |
1173 | */ | |
1174 | next_reclaimed = ssn; | |
1175 | } | |
1176 | ||
3d29dd9b EG |
1177 | if (tid != IWL_TID_NON_QOS) { |
1178 | priv->tid_data[sta_id][tid].next_reclaimed = | |
1179 | next_reclaimed; | |
0ca24daf | 1180 | IWL_DEBUG_TX_REPLY(priv, "Next reclaimed packet:%d\n", |
3d29dd9b EG |
1181 | next_reclaimed); |
1182 | } | |
eb9a372a | 1183 | |
a0eaad71 | 1184 | /*we can free until ssn % q.n_bd not inclusive */ |
9eae88fa | 1185 | WARN_ON(iwl_reclaim(priv, sta_id, tid, txq_id, ssn, &skbs)); |
20addec6 | 1186 | iwlagn_check_ratid_empty(priv, sta_id, tid); |
a0eaad71 | 1187 | freed = 0; |
2c6ab7ff JB |
1188 | |
1189 | /* process frames */ | |
1190 | skb_queue_walk(&skbs, skb) { | |
a0eaad71 EG |
1191 | hdr = (struct ieee80211_hdr *)skb->data; |
1192 | ||
1193 | if (!ieee80211_is_data_qos(hdr->frame_control)) | |
1194 | priv->last_seq_ctl = tx_resp->seq_ctl; | |
1195 | ||
1196 | info = IEEE80211_SKB_CB(skb); | |
1197 | ctx = info->driver_data[0]; | |
354928dd | 1198 | kmem_cache_free(iwl_tx_cmd_pool, |
dfa2bdba | 1199 | (info->driver_data[1])); |
a0eaad71 EG |
1200 | |
1201 | memset(&info->status, 0, sizeof(info->status)); | |
1202 | ||
1203 | if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && | |
1204 | iwl_is_associated_ctx(ctx) && ctx->vif && | |
1205 | ctx->vif->type == NL80211_IFTYPE_STATION) { | |
e755f882 JB |
1206 | /* block and stop all queues */ |
1207 | priv->passive_no_rx = true; | |
3251715d EG |
1208 | IWL_DEBUG_TX_QUEUES(priv, "stop all queues: " |
1209 | "passive channel"); | |
e755f882 | 1210 | ieee80211_stop_queues(priv->hw); |
a0eaad71 EG |
1211 | |
1212 | IWL_DEBUG_TX_REPLY(priv, | |
1213 | "TXQ %d status %s (0x%08x) " | |
1214 | "rate_n_flags 0x%x retries %d\n", | |
1215 | txq_id, | |
1216 | iwl_get_tx_fail_reason(status), | |
1217 | status, | |
1218 | le32_to_cpu(tx_resp->rate_n_flags), | |
1219 | tx_resp->failure_frame); | |
1220 | ||
1221 | IWL_DEBUG_TX_REPLY(priv, | |
1222 | "FrameCnt = %d, idx=%d\n", | |
1223 | tx_resp->frame_count, cmd_index); | |
1224 | } | |
1225 | ||
1226 | /* check if BAR is needed */ | |
1227 | if (is_agg && !iwl_is_tx_success(status)) | |
1228 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; | |
1229 | iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), | |
1230 | tx_resp, is_agg); | |
1231 | if (!is_agg) | |
1232 | iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); | |
1233 | ||
622a9268 IP |
1234 | is_offchannel_skb = |
1235 | (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN); | |
a0eaad71 EG |
1236 | freed++; |
1237 | } | |
74bcdb33 | 1238 | |
a0eaad71 | 1239 | WARN_ON(!is_agg && freed != 1); |
622a9268 IP |
1240 | |
1241 | /* | |
1242 | * An offchannel frame can be send only on the AUX queue, where | |
1243 | * there is no aggregation (and reordering) so it only is single | |
1244 | * skb is expected to be processed. | |
1245 | */ | |
1246 | WARN_ON(is_offchannel_skb && freed != 1); | |
a0eaad71 | 1247 | } |
8d801080 | 1248 | |
a0eaad71 | 1249 | iwl_check_abort_status(priv, tx_resp->frame_count, status); |
fa23cb04 | 1250 | spin_unlock(&priv->sta_lock); |
2c6ab7ff JB |
1251 | |
1252 | while (!skb_queue_empty(&skbs)) { | |
1253 | skb = __skb_dequeue(&skbs); | |
1254 | ieee80211_tx_status(priv->hw, skb); | |
1255 | } | |
1256 | ||
622a9268 IP |
1257 | if (is_offchannel_skb) |
1258 | iwl_scan_offchannel_skb_status(priv); | |
1259 | ||
247c61d6 | 1260 | return 0; |
8d801080 WYG |
1261 | } |
1262 | ||
74bcdb33 WYG |
1263 | /** |
1264 | * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA | |
1265 | * | |
1266 | * Handles block-acknowledge notification from device, which reports success | |
1267 | * of frames sent via aggregation. | |
1268 | */ | |
247c61d6 | 1269 | int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, |
48a2d66f | 1270 | struct iwl_rx_cmd_buffer *rxb, |
247c61d6 | 1271 | struct iwl_device_cmd *cmd) |
74bcdb33 WYG |
1272 | { |
1273 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 1274 | struct iwl_compressed_ba_resp *ba_resp = (void *)pkt->data; |
74bcdb33 | 1275 | struct iwl_ht_agg *agg; |
a0eaad71 EG |
1276 | struct sk_buff_head reclaimed_skbs; |
1277 | struct ieee80211_tx_info *info; | |
1278 | struct ieee80211_hdr *hdr; | |
1279 | struct sk_buff *skb; | |
74bcdb33 WYG |
1280 | int sta_id; |
1281 | int tid; | |
a0eaad71 | 1282 | int freed; |
74bcdb33 WYG |
1283 | |
1284 | /* "flow" corresponds to Tx queue */ | |
1285 | u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); | |
1286 | ||
1287 | /* "ssn" is start of block-ack Tx window, corresponds to index | |
1288 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
1289 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); | |
1290 | ||
2152268f | 1291 | if (scd_flow >= priv->cfg->base_params->num_of_queues) { |
74bcdb33 WYG |
1292 | IWL_ERR(priv, |
1293 | "BUG_ON scd_flow is bigger than number of queues\n"); | |
247c61d6 | 1294 | return 0; |
74bcdb33 WYG |
1295 | } |
1296 | ||
74bcdb33 WYG |
1297 | sta_id = ba_resp->sta_id; |
1298 | tid = ba_resp->tid; | |
04cf6824 | 1299 | agg = &priv->tid_data[sta_id][tid].agg; |
a0eaad71 | 1300 | |
fa23cb04 | 1301 | spin_lock(&priv->sta_lock); |
a0eaad71 | 1302 | |
76bc10fc EG |
1303 | if (unlikely(!agg->wait_for_ba)) { |
1304 | if (unlikely(ba_resp->bitmap)) | |
1305 | IWL_ERR(priv, "Received BA when not expected\n"); | |
fa23cb04 | 1306 | spin_unlock(&priv->sta_lock); |
247c61d6 | 1307 | return 0; |
b561e827 | 1308 | } |
74bcdb33 | 1309 | |
76bc10fc EG |
1310 | __skb_queue_head_init(&reclaimed_skbs); |
1311 | ||
1312 | /* Release all TFDs before the SSN, i.e. all TFDs in front of | |
1313 | * block-ack window (we assume that they've been successfully | |
1314 | * transmitted ... if not, it's too late anyway). */ | |
9eae88fa JB |
1315 | if (iwl_reclaim(priv, sta_id, tid, scd_flow, |
1316 | ba_resp_scd_ssn, &reclaimed_skbs)) { | |
fa23cb04 | 1317 | spin_unlock(&priv->sta_lock); |
247c61d6 | 1318 | return 0; |
a0eaad71 | 1319 | } |
74bcdb33 WYG |
1320 | |
1321 | IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " | |
1322 | "sta_id = %d\n", | |
1323 | agg->wait_for_ba, | |
1324 | (u8 *) &ba_resp->sta_addr_lo32, | |
1325 | ba_resp->sta_id); | |
a0eaad71 | 1326 | IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " |
a46c3e42 | 1327 | "scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", |
aca15f81 | 1328 | ba_resp->tid, le16_to_cpu(ba_resp->seq_ctl), |
74bcdb33 | 1329 | (unsigned long long)le64_to_cpu(ba_resp->bitmap), |
a46c3e42 EG |
1330 | scd_flow, ba_resp_scd_ssn, ba_resp->txed, |
1331 | ba_resp->txed_2_done); | |
74bcdb33 | 1332 | |
a0eaad71 | 1333 | /* Mark that the expected block-ack response arrived */ |
21023e26 | 1334 | agg->wait_for_ba = false; |
a0eaad71 EG |
1335 | |
1336 | /* Sanity check values reported by uCode */ | |
1337 | if (ba_resp->txed_2_done > ba_resp->txed) { | |
1338 | IWL_DEBUG_TX_REPLY(priv, | |
1339 | "bogus sent(%d) and ack(%d) count\n", | |
1340 | ba_resp->txed, ba_resp->txed_2_done); | |
1341 | /* | |
1342 | * set txed_2_done = txed, | |
1343 | * so it won't impact rate scale | |
1344 | */ | |
1345 | ba_resp->txed = ba_resp->txed_2_done; | |
1346 | } | |
a0eaad71 | 1347 | |
04cf6824 | 1348 | priv->tid_data[sta_id][tid].next_reclaimed = ba_resp_scd_ssn; |
76bc10fc | 1349 | |
20addec6 | 1350 | iwlagn_check_ratid_empty(priv, sta_id, tid); |
a0eaad71 | 1351 | freed = 0; |
74bcdb33 | 1352 | |
2c6ab7ff | 1353 | skb_queue_walk(&reclaimed_skbs, skb) { |
a0eaad71 | 1354 | hdr = (struct ieee80211_hdr *)skb->data; |
69fdb710 | 1355 | |
a0eaad71 EG |
1356 | if (ieee80211_is_data_qos(hdr->frame_control)) |
1357 | freed++; | |
1358 | else | |
1359 | WARN_ON_ONCE(1); | |
1360 | ||
1a849613 | 1361 | info = IEEE80211_SKB_CB(skb); |
354928dd | 1362 | kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1])); |
1a849613 EG |
1363 | |
1364 | if (freed == 1) { | |
a0eaad71 EG |
1365 | /* this is the first skb we deliver in this batch */ |
1366 | /* put the rate scaling data there */ | |
1367 | info = IEEE80211_SKB_CB(skb); | |
1368 | memset(&info->status, 0, sizeof(info->status)); | |
1369 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1370 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
1371 | info->status.ampdu_ack_len = ba_resp->txed_2_done; | |
1372 | info->status.ampdu_len = ba_resp->txed; | |
1373 | iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, | |
1374 | info); | |
1375 | } | |
69fdb710 JB |
1376 | } |
1377 | ||
fa23cb04 | 1378 | spin_unlock(&priv->sta_lock); |
2c6ab7ff JB |
1379 | |
1380 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
1381 | skb = __skb_dequeue(&reclaimed_skbs); | |
1382 | ieee80211_tx_status(priv->hw, skb); | |
1383 | } | |
1384 | ||
247c61d6 | 1385 | return 0; |
69fdb710 | 1386 | } |